Fiber-optic cuvette



FIG. 1 is a perspective view of a fiber-optic cuvette, showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an end elevational view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a fiber-optic cuvette, as shown and described. 